Bench base



FIG. 1 is a perspective view of the bench base.

FIG. 2 is a side view of the bench base.

FIG. 3 is a top view of the bench base.

FIG. 4 is a bottom view of the bench base; and,

FIG. 5 is an end view of the bench base. 

The ornamental design for a bench base, as shown and described. 